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https://issues.apache.org/jira/browse/BEAM-646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15876397#comment-15876397
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ASF GitHub Bot commented on BEAM-646:
-------------------------------------
GitHub user tgroh opened a pull request:
https://github.com/apache/beam/pull/2055
[BEAM-646] Add a Base OverrideFactory class for 1-to-1 overrides
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---
These overrides are relatively common, and this reduces the
reimplementation of mapping singletons and casting them.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/tgroh/beam one-to-one_overrides
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/beam/pull/2055.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #2055
----
commit 1f15eba04c034e49feb34ff2b1ae8b7ff79268e9
Author: Thomas Groh <[email protected]>
Date: 2017-02-17T03:14:23Z
Add a Base OverrideFactory class for 1-to-1 overrides
These overrides are relatively common, and this reduces the
reimplementation of mapping singletons and casting them.
commit 2577f0b491b284a1a7c65b562b80614ff888050e
Author: Thomas Groh <[email protected]>
Date: 2017-02-21T17:55:47Z
Migrate DirectRunner one-to-one factories
Use SingleInputOutputOverrideFactory to reduce prevalence of
boilerplate.
----
> Get runners out of the apply()
> ------------------------------
>
> Key: BEAM-646
> URL: https://issues.apache.org/jira/browse/BEAM-646
> Project: Beam
> Issue Type: Improvement
> Components: beam-model-runner-api, sdk-java-core
> Reporter: Kenneth Knowles
> Assignee: Thomas Groh
> Labels: backwards-incompatible
>
> Right now, the runner intercepts calls to apply() and replaces transforms as
> we go. This means that there is no "original" user graph. For portability and
> misc architectural benefits, we would like to build the original graph first,
> and have the runner override later.
> Some runners already work in this manner, but we could integrate it more
> smoothly, with more validation, via some handy APIs on e.g. the Pipeline
> object.
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